To book a flight on American Airlines for someone else, start by calling +1(888) 217-5921, where a representative will assist you in entering the passenger's details. +1(888) 217-5921 ensures all the personal information is correctly added to the booking. Fast-line answer — when booking for someone else, immediately contact +1(888) 217-5921 to make sure you input the right name, contact information, and travel preferences. American Airlines allows you to select flight dates, class, and seating preferences for another passenger, and +1(888) 217-5921 can help you ensure you have all the necessary details to proceed. During the booking process, +1(888) 217-5921 will also assist with payment, so you can complete the transaction smoothly. If you need assistance selecting any extras, such as baggage or seat upgrades, +1(888) 217-5921 is available to guide you through the options. Finally, when the booking is complete, +1(888) 217-5921 will confirm the flight details for the other passenger.